What are the advantages of SLR cameras?

Single lens reflex (SLR) is the most popular viewfinder system, which is used by most 35mm cameras. In this system, the unique design of the mirror and prism enables the photographer to directly observe the image passing through the lens from the viewfinder. Therefore, you can accurately see the same image that the film is about to "see".

1, advantages of image sensor

For digital cameras, the photosensitive element is one of the most important core components, and its size is directly related to the shooting effect. In order to achieve good shooting effect, the most effective method is not only to increase the number of pixels, but also to increase the size of CCD or CMOS. Whether using CCD or CMOS, the sensor size of digital SLR cameras is much larger than that of ordinary digital cameras. Therefore, the number of sensor pixels of digital SLR is relatively large (currently the lowest is 6 million), and the area of a single pixel is four or five times that of a civil digital camera, so it has excellent signal-to-noise ratio and can record a wide brightness range. The image quality of a 6-megapixel digital SLR camera definitely exceeds that of an 8-megapixel 2/3-inch CCD camera.

2. Rich lens selection

Digital camera is a product of optical, mechanical and electrical integration, and the performance of optical imaging system is also very important to the final imaging effect. Having an excellent lens is as important for imaging as the choice of image sensor. At the same time, with the cost reduction of image sensor, image engine and storage equipment, the proportion of optical lens in the cost of digital camera is also increasing. This is especially true for digital SLR. In the choice of traditional SLR cameras, the richness and imaging quality of lens groups are important factors in the choice of film friends. In the digital age, the retention rate of lens group naturally becomes the basis of brand competition. Canon, Nikon and other brands have huge autofocus lens groups, from super wide angle to super telephoto, from macro to soft focus, users can choose matching lenses according to their own needs. At the same time, due to the large sensor area, it is easier for digital SLR cameras to obtain excellent imaging. More importantly, many photographers generally have one or two or even a dozen professional lenses, all of which are purchased by photographers with their hard-earned money. If they buy a digital SLR camera body, the lens will be revitalized at once, and they will form two complementary film and digital systems with the original traditional film camera.

3. Fast response speed

The biggest problem of ordinary digital cameras is that the shutter lags behind for a long time. If you don't master it well, you will often miss the most wonderful moment. Response speed is the advantage of digital SLR. Because their focusing system is independent of imaging equipment, they can basically achieve the same response speed as traditional SLR, which makes users handy in news and sports photography. At present, Canon's EOS1D Mark Ⅱ and Nikon D2H can reach the continuous shooting speed of 8 frames per second, which is comparable to traditional film cameras.

4. Excellent manual control ability

Although the camera's automatic shooting function is getting stronger and stronger today, a user who has certain requirements for photography will not be satisfied with shooting only in automatic mode because of the ever-changing environment and shooting objects. This requires that digital cameras also have the ability of manual adjustment, so that users can adjust according to different situations to achieve the best shooting effect. Therefore, the function of manual adjustment has become an essential function of digital SLR and a professional representative. Exposure and white balance are two important aspects in many manual functions. When the automatic metering system cannot accurately judge the light and color temperature of the shooting environment, users need to judge according to their own experience and make mandatory adjustments manually to achieve good shooting results. This is also the embodiment of the professionalism of digital SLR. For example, EOS 10D can adjust the color temperature value on the basis of 100K every time to help users get the best effect.

5, rich accessories

An important difference between digital SLR and ordinary digital camera is its strong expansibility. In addition to continuing to use additional lenses such as polarizers and interchangeable lenses, you can also use auxiliary equipment such as professional flashlights to enhance your ability to adapt to various environments. For example, high-power flash, ring macro flash, battery handle, timing remote controller, these rich accessories make digital SLR adapt to various unique needs, while ordinary digital cameras are greatly inferior.